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font: rules outside any section can be applied multiple times

This is for backward compatibility (for font descriptions generated by
older versions of Neatmkfn).

--- a/font.c

+++ b/font.c

@@ -204,10 +204,10 @@

 		while (1) {

 			int r = font_findrule(fn, 0, 0, src + i, slen - i,

 						src + i, i, &idx);

-			if (r < 0)			/* no rule found */

+			if (r < 0)		/* no rule found */

 				break;

-			if (gpos[r].sec == lastsec)	/* perform at most one rule from each lookup */

-				continue;

+			if (gpos[r].sec > 0 && gpos[r].sec == lastsec)

+				continue;	/* perform at most one rule from each lookup */

 			lastsec = gpos[r].sec;

 			pats = gpos[r].pats;

 			for (k = 0; k < gpos[r].len; k++) {